... Also, let a, b and c be the lengths of its three sides-- a of the side across from A, b of the one across from B, and c the longest one, across from C. Two useful ratios associated with the angle A ("trigonometric functions of A ") are . The sine of A sin A = a/c (involving the side a across from A ) . The cosine of A cos A = b/c (involving the side b besides A ) . ... The tangent of A . ... Calculators usually have a button " tan " which, if you punch in the angle, gives you the tangent. ...

... In the US and in other mid-latitude countries north of the equator (e.g those of Europe), the sun's daily trip (as it appears to us) is an arc across the southern sky. ... Moss avoids direct sunlight, and with the sun's path curving across the southern sky, the north side of a tree-trunk is the one most shaded. ... In addition, they are invariably tilted at an angle around 450, to make sure that the arrival of the sun's rays is as close to perpendicular as possible. ...

HST INS Work Item Data Sheet 1. SI/Title: STIS/Spectral Dithering within MultiDrizzle 2. ... The intent is to allow combination of sets of spectral images which involve inter-exposure offsets (dithers) in the dispersion direction (across the slit), the spatial direction (along the slit), or both. ... It will also involve writing an ISR and-likely-the need for delivery of reference files that allow for a correction of the throughput loss associated with stepping a source across the slit. ...

Allows you to specify a drift scan: motion at a constant velocity along a great circle. ... The path starts at the new object position (though the telescope actually intersects the path later, see Subtleties ). ... Note that the units are always /sec for both axes. ... The velocity along the path is 0.01 /sec. ... The path is assumed to start when you hit the Slew button (more precisely, when the TCC parses the command). However, it takes the telescope awhile to slew to meet the specified path. ...

Next: CORRELATOR BOARDS Up: OBSERVING PROCEDURES Previous: Frequency Switching . ... Continuum sources in the list used for flux density calibration were selected in an ad-hoc fashion from a variety of places, but primarily from Kuehr et al (A&AS, 45, 367, 1981), the compendium of linearly polarized sources by Tabara & Inoue (A&AS, 39, 379, 1980), and an unpublished list of unconfused calibrator sources prepared from the NVSS survey by Jim Condon and Qi Feng Yin. ... Board 0 . ...

So how do we find objects on the other side of the Universe? ... The latest instruments enable us to scan large areas of sky. Using Cerro Tololo's Blanco 4m telescope and the Canada-France-Hawaii 3.5 metre telescope , we are able to scan a piece of sky larger than the size of the moon every 5 minutes to a faintness level which allows us to find Type Ia supernovae halfway across the Universe. Type Ia supernovae are very rare - but each image we take contains 50000 galaxies. ...

... The first step to improve the FORS calibration is therefore to obtain data to allow a computation of the illumination correction across the field. ... Another limitation on the calibration accuracy has been the brightness of the Landolt standards which have forced the use of extremely short exposures introducing small but non-negligible shutter-time errors and also resulting in a very small number of useful standards per frame. ...

... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 > SSL/TLS . ... Client Authentication and Access Control . ... How can I create an SSL server which accepts strong encryption only? How can I create an SSL server which accepts strong encryption only, but allows export browsers to upgrade to stronger encryption? How can I create an SSL server which accepts all types of ciphers in general, but requires a strong cipher for access to a particular URL? ...

... You can work in group sizes as large as 5. Each individual in that group could be assigned a particular question which would allow the group to complete the assignment in a more efficient manner. ... Off in the corner of the store was a small black box with a big sign that read . ... As the century turned, Africa began to emerge from a Dark Age stretching as far back as life on earth, into all the years that lay ahead - years of Renaissance, Enlightenment, Industry, and, if you will, Anxiety. ...

Images of Pluto taken by the NASA Hubble Space Telescope with the ESA Faint Object Camera. These images, taken in late June and early July, 1994 are the first views which allow resolution of features on Pluto's surface. ... The large lower images are processed versions made from a number of Hubble observations. ... Central Latitude/Longitude (deg): N/A . ... Instrument: HST ESA Faint Object Camera (FOC) . ... Illumination Incidence Angle (deg): N/A . ... Greenbelt, MD 20771, USA . ...

The beam pattern and the polarization characteristics . of the radio telescope RATAN-600 . The Mueller matrix elements was computed via formulas [1]: . ... The BP were computed by the aperture method, proceeding from the fild distribution in the aperture of the primary mirror. The components of the main and cross-polarization components of the electric field in the vertical aperture of the primary mirror was computed in Frenel diffraction approximation. ...

Next: Dark current and cooling Up: CCD Scientific Performance Previous: Particle Background Rejection . ... A standard TV format CCD is only 15mm across its diagonal, and hence substantial effort has had to be expended to increase the size of individual chips, and to develop techniques for mosaicking many chips, efficiently to cover the focal plane areas. ... This aspect alone hints at the complex trade-offs involved in the design of a CCD focal plane. ...

... A color image of the Andromeda galaxy always takes a little of my breath away: its golden yellow center, its bluish gossamer arms, its small, burr-like, fuzzy elliptical companion, M32. ... The beautiful images of Andromeda are a start; they give us a sense of what good form is for galaxies like our own. ... Meanwhile, radio astronomers have peered to the very center of the Galaxy and the hungry black hole there; the long radio wavelengths cut right through the dense underbrush of the Galactic...

Astronomy Picture of the Day . The Suns Surface in 3D . ... 24.06.2003 . ... Lockheed-Martin Solar Astrophysics Lab. Explanation: How smooth is the Sun? The new Swedish 1-m Solar Telescope , deployed in the Canary Islands only last year, allows imaging of objects less than 100-km across on the Sun's surface . ... Publications with keywords: Sun - 3D - surface . Publications with words: Sun - 3D - surface . ... A Filament Across the Sun . ... Live: Watching for Venus to Cross the Sun . ...

... December 27, 1997 . Keck: The Largest Optical Telescopes . ... Explanation: In buildings eight stories tall rest mirrors ten meters across that are slowly allowing humanity to map the universe. Alone, each is the world's largest optical telescope : Keck . Together, the twin Keck telescopes have the resolving power of a single telescope 90-meter in diameter, able to discern sources just milliarcseconds apart. ... About APOD > . ...

... Today this year's largest group of sunspots will cross the Sun's central meridian. ... The next day, the number of spots in the group reached five, and the day after, on June 2nd, it was possible to count thirteen sunspots on solar disk, which had been clear prior to this. ... This year's two most powerful active areas, which passed across the solar disk at the beginning of May, 2009, are set to appear in the Sun's eastern sector in two days, on June 6th. ...

. This widget allows you to pan across an image in an ImageDisplay widget. Library: karmawidgets . Link With: -lkarmawidgets . PannerPopup_Resources . List of resources for PannerPopup widget . PannerPopup_Resources List of resources for PannerPopup widget . Name . Class . Rep. Type . Default . "empty" . "Empty" . XtRInt . False . Back to Karma Home Page . Contact: Richard Gooch . Web Development: Ariel Internet Services

OptInt PmWiki : Pm Wiki / Documentation Index . Beginner Topics for Creating/Editing Pages . ... The pages below describe various aspects of using , administering and troubleshooting a PmWiki installation, as well as aspects of the PmWiki community . ... Page variables - variables that are associated with pages . Page text variables - Page variables automatically made available through natural or explicit page markup . ... Wiki structure - PmWiki structural support for page organization . ...

... Content Model: PCDATA (i.e. text and entities) . To let users enter more than one line of text, use the TEXTAREA element. ... The text up to the end tag is used to initialize the field's value. ... User agents should tolerate the same range of line terminators within the initialization text. In a typical rendering, the ROWS and COLS attributes determine the visible dimension of the field in characters. ... User agents should allow text to grow beyond these limits by scrolling as needed. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Aurora . ... Corona . Fireballs . ... Zodiacal Light . ... The first thing to do is get acquainted with what the night sky looks like. ... The National Schools Observatory web site has very good horizon views of the sky for the current night. ... If the object is moving slowly across the sky then it may be one of the larger satellites. ... Cloudbait Observatory - October 2002 . ... October 2003 Aurora at Armagh . ...